java 文件下载

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下列代码实现本地文件的下载功能

String fileName = "Operator.doc".toString(); //文件的默认保存名
//读到流中
InputStream inStream=new FileInputStream("c:/Operator.doc");//文件的存放路径
//设置输出的格式
response.reset();
response.setContentType("bin");
response.addHeader("Content-Disposition","attachment; filename=/"" + fileName + "/"");
//循环取出流中的数据
byte[] b = new byte[100];
int len;
while((len=inStream.read(b)) >0)
response.getOutputStream().write(b,0,len);
inStream.close();

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下列代码实现网络文件的下载功能

int bytesum=0;

int byteread=0;

URL url = new URL("windine.blogdriver.com/logo.gif");

URLConnection conn = url.openConnection();

InputStream inStream = conn.getInputStream();

FileOutputStream fs=new FileOutputStream( "c:/abc.gif");

byte[] buffer =new byte[1204];

int length;

while ((byteread=inStream.read(buffer))!=-1)

{

bytesum+=byteread;

System.out.println(bytesum);

fs.write(buffer,0,byteread);

}